Second-ranked Iga Świątek ended Coco Gauff’s 16-match winning streak as she advanced to the China Open final with a dominant 6-2, 6-3 victory over the US Open champion on Saturday. It was the 19-year-old Gauff’s first loss since the quarter-finals in Montreal, a span that included titles in Cincinnati and at Flushing Meadows. Świątek will meet No 22-ranked Liudmila Samsonova in Sunday’s final, after the Russian ousted fifth-seeded Elena Rybakina 7-6 (7), 6-3. The Polish player made just four unforced errors in the first set, keeping consistent pressure on Gauff’s serve, and made a decisive break at 3-1 to ease through the set in 40 minutes. Świątek maintained her vice-like grip on the match, breaking Gauff at the start of the second set to lead 2-0. A medical timeout to have Gauff’s right shoulder assessed didn’t break Świątek’s momentum as she closed it out to extend her head-to-head record against her rival to 8-1. “I’m really happy with my performance,” Świątek said. “It feels like I can play freely again, so I’m really happy. It’s …